Cited by 162Parkinson's Disease Mechanisms and TreatmentsNuclear Receptors and SignalingNeurotransmitter Receptor Influence on Behavior

Aging-related changes in the nigrostriatal dopamine system and the response to MPTP in nonhuman primates: Diminished compensatory mechanisms as a prelude to parkinsonism

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Collier, Timothy J., Lipton, Jack, Daley, Brian F., Palfi, Stephane, Chu, Yaping, Sortwell, Caryl, Bakay, Roy A.E., Sladek, John R. +1 more·2007·Neurobiology of Disease

Abstract

Aging is the most prominent risk factor for Parkinson's disease. Yet, consensus of how advancing age may predispose the dopamine (DA) system to parkinsonism is lacking. Three age ranges of female rhesus monkeys, 8-9, 15-17, and 21-31 years, received unilateral DA depletion with intracarotid 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Morphological and biochemical analyses of DA-depleted and intact hemispheres revealed three primary findings: (1) The intact striatum exhibited age-related declines in dopamine (DA) and homovanillic acid (HVA) that were present by middle age; (2) In the MPTP-treated striatum, the compensatory increase in DA activity was absent in old monkeys; and (3) Age-associated morphological changes included declines in the density of tyrosine hydroxylase (TH) positive fibers in striatum, decreased nigral soma size, and optical density of TH, but no significant loss of neurons. These findings suggest that aging produces changes in the nigrostriatal DA system that approach the threshold for expression of parkinsonian features, and that progressive impairment of plasticity may be central to the role of aging in development of parkinsonism.

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  1. Kanaan NM, Kordower JH, Collier TJ. Accumulation of intracellular inclusions in dopaminergic subregions of the midbrain during normal aging in the rhesus monkey: relevance in differential susceptibility to degeneration. Soc Neurosci. 2006 Abstract 75.1. [Google Scholar]

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Authors
Collier, T. J., Lipton, J., Daley, B. F., Palfi, S., Chu, Y., Sortwell, C., Bakay, R. A. E., Sladek, J. R., & Kordower, J. H.
Affiliations
  • University of Cincinnati (US)
  • Rush University Medical Center (US)
Corresponding author
Collier, Timothy J.
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2007-04
Volume
26
Issue
1
Pages
56-65
ISSN
0969-9961 (ISSN-L)
OpenAlex
W2041046421
Cited by
162
References
35
Citations by year
2026: 3 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 14 · 2021: 4 · 2020: 12 · 2019: 1 · 2018: 12 · 2017: 7 · 2016: 7 · 2015: 4 · 2014: 12 · 2013: 7 · 2012: 10
FWCI
10.14
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institutes of Health (AG17092)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
aging, Parkinson's disease, nigrostriatal dopamine system, MPTP, dopamine depletion, compensatory mechanisms, striatum, homovanillic acid, tyrosine hydroxylase, substantia nigra, rhesus monkeys, neuroplasticity, age-related decline
MeSH terms
Aging, Animals, Behavior, Animal, Brain, Chromatography, High Pressure Liquid, Dopamine, Female, Immunohistochemistry, Macaca mulatta, Motor Activity, Parkinson Disease, Secondary, Substantia Nigra, Tyrosine 3-Monooxygenase, Neostriatum, MPTP Poisoning

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